ntl (or one of its subpacakges) has multiarch conflicts when installed for both i386 and x86_64 in the Fedora development tree. For help in resolving them, see http://fedoraproject.org/wiki/PackagingDrafts/MultilibTricks. 

  file /usr/include/NTL/config.h from install of ntl-devel-5.4-6.fc8 conflicts with file from package ntl-devel-5.4-6.fc8
  file /usr/include/NTL/gmp_aux.h from install of ntl-devel-5.4-6.fc8 conflicts with file from package ntl-devel-5.4-6.fc8
  file /usr/include/NTL/mach_desc.h from install of ntl-devel-5.4-6.fc8 conflicts with file from package ntl-devel-5.4-6.fc8

(Note that this is an automated bug filing.)
It would be nice to have these bugs fixed by the beta of Fedora 9.